overlay-operators: Show call barring item by default again

In previous Android versions call_barring_visibility_bool was patched up
in the framework to default to true. See commit
platform/frameworks/base@a832cd4e01 on CodeAurora/CodeLinaro. Enable it
by default in our overlay, instead of patching the framework again.

Issue: FP3-A13#56
Issue: FP3-A13#99
Change-Id: I70078cba3c47bad7e350e5aa7120604334fa1a0d
1 file changed